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Standard XII

Physics

Atmospheric Pressure

Water flows t...

Question

Water flows through a horizontal tube of variable cross-section as shown in the figure. The area of the cross-section at A and B are $4 m m^{2}$ and $2 m m^{2}$ respectively. Suppose the tube is now kept in vertical with B upward and water enters through B at a rate of 1 $c m^{3} s^{- 1}$ , find the pressure difference $P_{A} - P_{B}$ . Take $g = 10 m s^{- 2}$

188 N m^{- 2}

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0 N m^{- 2}

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94 N m^{- 2}

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88 N m^{- 2}

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Solution

The correct options are
A $188 N m^{- 2}$
C $94 N m^{- 2}$

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Similar questions

Water flows through a horizontal tube of variable cross section figure. The area of cross section at A and B are 4 $m m^{2}$ and 2 $m m^{2}$ respectively. If 1 cc of water enters per second through A, find (a) the speed of water at A, (b) the speed of water at B and (c) the pressure difference $P_{A} — P_{B}$ .

Q. Water flows through a horizontal tube of variable cross section. The area of cross section at A and B are 4 mm²and 2 mm² respectively. If 1 cc of water enters per second through A, find (a) the speed of water at A, (b) the speed of water at B and (c) the pressure difference P_A − P_B.

Q. Water flows through a vertical tube of variable cross section. The area of cross - section at

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and

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| P_{A} - P_{B} |

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and

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100 cm

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)